This is the 6060th most frequent Russian word.
составляла
"Составляла" means "constituted" or "comprised" in English.
In this sentence, "составляла" is used to indicate the action of compiling or making something, specifically a list of items for purchase.
Она составляла список покупок.
She was making a shopping list.
Here, "составляла" is used to denote the total amount or measure of something, in this case, a price.
Прошлая цена составляла пятьсот рублей.
The previous price was five hundred rubles.
In this case, "составляла" describes the action of forming or organizing a systematic approach, referring to the action plan.